%0 Journal Article
%T Exchange bias in a core/shell magnetic nanoparticle: Monte Carlo simulation
%A M. H. Wu
%A Q. C. Li
%A J. M. Liu
%J Physics
%D 2006
%I arXiv
%X By using Monte Carlo simulation on a ferromagnetic core/antiferromagnetic shell nanoparticle, we investigate in details the exchange bias of the magnetic hysteresis as a function of both core radius and shell thickness, at low temperature. It is found that the exchange bias is very sensitive to the core radius and a small variation of the radius may lead to a big fluctuation of the bias. In a general tendency the exchange bias is enhanced by increasing shell thickness and decreasing core radius. The intrinsic correlation between the exchange bias and the spin configuration on the core-shell interface is demonstrated. We further investigate the dependence of the exchange bias on temperature and random field inside the nanoparticle, indicating a monotonous decreasing of the bias with the magnitude of random field and temperature, respectively.
%U http://arxiv.org/abs/cond-mat/0612228v1